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Finding the Fourth Proportional to 261,267.58, 391,236.63 and 172,251.01

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Solution

The fourth proportional to 261,267.58, 391,236.63 and 172,251.01 is: 257,938.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,267.58 : 391,236.63 = 172,251.01 : x
  2. Step 2: Convert to fraction form
    261,267.58/391,236.63 = 172,251.01/x
  3. Step 3: Cross multiply
    261,267.58x = 391,236.63 × 172,251.01
  4. Step 4: Simplify right side
    261,267.58x = 67,390,904,666.50
  5. Step 5: Solve for x
    x = 67,390,904,666.50/261,267.58
  6. Step 6: Final answer
    x = 257,938.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.